A coloured pencil drawing based on a note tied to one of the Keel Billed Toucan specimen's feet. The note was included as reference, since when the bird dies, the bill loses it's fantastic colour. As far as I can tell the note was written by Blancaneux.

More dark carmine at tip. A long orange mark with 1/2 in of face. (As in dried skin). A black line round bill at base. Narrow cerulean line between the black at base. The orange along cutting edge of base keel of mandible sky blue near the carmine tip. Rest of (mandible?) clear yellow. More greenish near base.